# CVE-2025-69820: CVE-2025-69820

Status: published. Published: 2026-01-22. Updated: 2026-11-02.

Directory Traversal vulnerability in Beam beta9 v.0.1.521 allows a remote attacker to obtain sensitive information via the joinCleanPath function.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- beam / beta9_worker: 0.1.522 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:beam:beta9_worker:0.1.522:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 6 (medium); CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-22

## Exploit evidence

- exploit: https://github.com/ryotaromatsui/CVEs/tree/main/CVE-2025-69820 (cve@mitre.org)

## References

- https://github.com/aws/aws-sdk-php/security/advisories/GHSA-557v-xcg6-rm5m (cve@mitre.org; Not Applicable)

- https://github.com/beam-cloud/beta9/blob/c1cd75e813cf7d53e916157d920099e89ef45caa/pkg/abstractions/volume/multipart.go#L45 (cve@mitre.org; Product)

- https://github.com/ryotaromatsui/CVEs/tree/main/CVE-2025-69820 (cve@mitre.org; Exploit, Third Party Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-69820; retrieved 2026-11-03; source updated 2026-11-02

Revision: d6a63a74a335f354948bffc3cd4bfdc81ae0911e85e64e519fda03cda92a6900

Canonical: https://y2.dev/cve/CVE-2025-69820

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